<?php

// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id: UploadFile_sae.class.php 2766 2012-02-20 15:58:21Z luofei614@gmail.com $

/**
  +------------------------------------------------------------------------------
 * 文件上传类
  +------------------------------------------------------------------------------
 * @category   ORG
 * @package  ORG
 * @subpackage  Net
 * @author    liu21st <liu21st@gmail.com>
 * @version   $Id: UploadFile_sae.class.php 2766 2012-02-20 15:58:21Z luofei614@gmail.com $
  +------------------------------------------------------------------------------
 */
class UploadFile {//类定义开始
    // 上传文件的最大值

    public $maxSize = -1;
    // 是否支持多文件上传
    public $supportMulti = true;
    // 允许上传的文件后缀
    //  留空不作后缀检查
    public $allowExts = array();
    // 允许上传的文件类型
    // 留空不做检查
    public $allowTypes = array();
    // 使用对上传图片进行缩略图处理
    public $thumb = false;
    // 图库类包路径
    public $imageClassPath = 'ORG.Util.Image';
    // 缩略图最大宽度
    public $thumbMaxWidth;
    // 缩略图最大高度
    public $thumbMaxHeight;
    // 缩略图前缀
    public $thumbPrefix = 'thumb_';
    public $thumbSuffix = '';
    // 缩略图保存路径
    public $thumbPath = '';
    // 缩略图文件名
    public $thumbFile = '';
    // 是否移除原图
    public $thumbRemoveOrigin = false;
    // 压缩图片文件上传
    public $zipImages = false;
    // 启用子目录保存文件
    public $autoSub = false;
    // 子目录创建方式 可以使用hash date
    public $subType = 'hash';
    public $dateFormat = 'Ymd';
    public $hashLevel = 1; // hash的目录层次
    // 上传文件保存路径
    public $savePath = '';
    public $autoCheck = true; // 是否自动检查附件
    // 存在同名是否覆盖
    public $uploadReplace = false;
    // 上传文件命名规则
    // 例如可以是 time uniqid com_create_guid 等
    // 必须是一个无需任何参数的函数名 可以使用自定义函数
    public $saveRule = '';
    // 上传文件Hash规则函数名
    // 例如可以是 md5_file sha1_file 等
    public $hashType = 'md5_file';
    // 错误信息
    private $error = '';
    // 上传成功的文件信息
    private $uploadFileInfo;
    //[sae] domain
    private $domain;
    private $thumbDomain;

    /**
      +----------------------------------------------------------
     * 架构函数
      +----------------------------------------------------------
     * @access public
      +----------------------------------------------------------
     */
    public function __construct($maxSize='', $allowExts='', $allowTypes='', $savePath='', $saveRule='') {
        if (!empty($maxSize) && is_numeric($maxSize)) {
            $this->maxSize = $maxSize;
        }
        if (!empty($allowExts)) {
            if (is_array($allowExts)) {
                $this->allowExts = array_map('strtolower', $allowExts);
            } else {
                $this->allowExts = explode(',', strtolower($allowExts));
            }
        }
        if (!empty($allowTypes)) {
            if (is_array($allowTypes)) {
                $this->allowTypes = array_map('strtolower', $allowTypes);
            } else {
                $this->allowTypes = explode(',', strtolower($allowTypes));
            }
        }
        if (!empty($saveRule)) {
            $this->saveRule = $saveRule;
        } else {
            $this->saveRule = C('UPLOAD_FILE_RULE');
        }
        $this->savePath = $savePath;
    }

    /**
      +----------------------------------------------------------
     * 上传一个文件
      +----------------------------------------------------------
     * @access public
      +----------------------------------------------------------
     * @param mixed $name 数据
     * @param string $value  数据表名
      +----------------------------------------------------------
     * @return string
      +----------------------------------------------------------
     * @throws ThinkExecption
      +----------------------------------------------------------
     */
    private function save($file) {
        $filename = $file['savepath'] . $file['savename'];
        $s = Think::instance('SaeStorage');
        if (!$this->uploadReplace && $s->fileExists($this->domain, $filename)) {
            // 不覆盖同名文件
            $this->error = '文件已经存在！' . $filename;
            return false;
        }
        // 如果是图像文件 检测文件格式
        if (in_array(strtolower($file['extension']), array('gif', 'jpg', 'jpeg', 'bmp', 'png', 'swf')) && false === getimagesize($file['tmp_name'])) {
            $this->error = '非法图像文件';
            return false;
        }
        //if(!move_uploaded_file($file['tmp_name'], $this->autoCharset($filename,'utf-8','gbk'))) {
        if (!$this->thumbRemoveOrigin && !$s->upload($this->domain, $filename, $file['tmp_name']) ) {
                $this->error = $s->errno() == -7 ? 'domain [ ' . $this->domain . ' ] 不存在！请在SAE控制台的Storage服务中添加一个domain' : '文件上传保存错误！';
                return false;
        }
        if ($this->thumb && in_array(strtolower($file['extension']), array('gif', 'jpg', 'jpeg', 'bmp', 'png'))) {
            $image = getimagesize($file['tmp_name']);
            if (false !== $image) {
                //是图像文件生成缩略图
                $thumbWidth = explode(',', $this->thumbMaxWidth);
                $thumbHeight = explode(',', $this->thumbMaxHeight);
                $thumbPrefix = explode(',', $this->thumbPrefix);
                $thumbSuffix = explode(',', $this->thumbSuffix);
                $thumbFile = explode(',', $this->thumbFile);
                $thumbPath = $this->thumbPath ? $this->thumbPath : $file['savepath'];
                //[sae] 定义缩略图目录时，判断doamin
                $domain = $this->thumbPath ? $this->thumbDomain : $this->domain;
                //[sae] 用自带image类生成缩略图
                $realFilename = $this->autoSub ? basename($file['savename']) : $file['savename'];
                $srcWidth = $image[0];
                $srcHeight = $image[1];
                $img = Think::instance('SaeImage');
                for ($i = 0, $len = count($thumbWidth); $i < $len; $i++) {
                    $scale = min($thumbWidth[$i] / $srcWidth, $thumbHeight[$i] / $srcHeight); // 计算缩放比例
                    if ($scale >= 1) {
                        // 超过原图大小不再缩略
                        $width = $srcWidth;
                        $height = $srcHeight;
                    } else {
                        // 缩略图尺寸
                        $width = (int) ($srcWidth * $scale);
                        $height = (int) ($srcHeight * $scale);
                    }
                    $thumbname = $thumbPrefix[$i] . substr($realFilename, 0, strrpos($realFilename, '.')) . $thumbSuffix[$i] . '.' . $file['extension'];
                    $img->setData(file_get_contents($file['tmp_name']));
                    $img->resize($width, $height);
                    $new_data = $img->exec();
                    if (!$s->write($domain, $thumbPath . $thumbname, $new_data)) {
                        $this->error = $s->errno() == -7 ? 'domain [ ' . $this->domain . ' ] 不存在！请在SAE控制台的Storage服务中添加一个domain' : '生成缩略图失败！';
                        return false;
                    }
                }
            }
        }
        if ($this->zipImags) {
            // TODO 对图片压缩包在线解压
        }
        return true;
    }

    //[sae]获得domain，改变path
    private function getDomain($filePath) {
        $arr = explode('/', ltrim($filePath, './'));
        $domain = array_shift($arr);
        $filePath = implode('/', $arr);
        return array($domain, $filePath);
    }

    /**
      +----------------------------------------------------------
     * 上传所有文件
      +----------------------------------------------------------
     * @access public
      +----------------------------------------------------------
     * @param string $savePath  上传文件保存路径
      +----------------------------------------------------------
     * @return string
      +----------------------------------------------------------
     * @throws ThinkExecption
      +----------------------------------------------------------
     */
    public function upload($savePath ='') {
        //如果不指定保存文件名，则由系统默认
        if (empty($savePath))
            $savePath = $this->savePath;
        //[sae] 去掉检查上传目录
        $fileInfo = array();
        $isUpload = false;
        //[sae] 分析出domain，第一个目录为domain
        list($this->domain, $savePath) = $this->getDomain($savePath);
        //[sae] 分析缩略图保存地址
        if ($this->thumb && $this->thumbPath)
            list($this->thumbDomain, $this->thumbPath) = $this->getDomain($this->thumbPath);
        // 获取上传的文件信息
        // 对$_FILES数组信息处理
        $files = $this->dealFiles($_FILES);
        foreach ($files as $key => $file) {
            //过滤无效的上传
            if (!empty($file['name'])) {
                //登记上传文件的扩展信息
                $file['key'] = $key;
                $file['extension'] = $this->getExt($file['name']);
                $file['savepath'] = $savePath;
                $file['savename'] = $this->getSaveName($file);

                // 自动检查附件
                if ($this->autoCheck) {
                    if (!$this->check($file))
                        return false;
                }

                //保存上传文件
                if (!$this->save($file))
                    return false;
                if (function_exists($this->hashType)) {
                    $fun = $this->hashType;
                    $file['hash'] = $fun($this->autoCharset($file['savepath'] . $file['savename'], 'utf-8', 'gbk'));
                }
                //上传成功后保存文件信息，供其他地方调用
                unset($file['tmp_name'], $file['error']);
                $fileInfo[] = $file;
                $isUpload = true;
            }
        }
        if ($isUpload) {
            $this->uploadFileInfo = $fileInfo;
            return true;
        } else {
            $this->error = '没有选择上传文件';
            return false;
        }
    }

    /**
      +----------------------------------------------------------
     * 上传单个上传字段中的文件 支持多附件
      +----------------------------------------------------------
     * @access public
      +----------------------------------------------------------
     * @param array $file  上传文件信息
     * @param string $savePath  上传文件保存路径
      +----------------------------------------------------------
     * @return string
      +----------------------------------------------------------
     * @throws ThinkExecption
      +----------------------------------------------------------
     */
    public function uploadOne($file, $savePath='') {
        //如果不指定保存文件名，则由系统默认
        if (empty($savePath))
            $savePath = $this->savePath;
        //[sae] 不检查上传目录
        //[sae] 分析出domain，第一个目录为domain
        list($this->domain, $savePath) = $this->getDomain($savePath);
        //[sae] 分析缩略图保存地址
        if ($this->thumb && $this->thumbPath)
            list($this->thumbDomain, $this->thumbPath) = $this->getDomain($this->thumbPath);
        //过滤无效的上传
        if (!empty($file['name'])) {
            $fileArray = array();
            if (is_array($file['name'])) {
                $keys = array_keys($file);
                $count = count($file['name']);
                for ($i = 0; $i < $count; $i++) {
                    foreach ($keys as $key)
                        $fileArray[$i][$key] = $file[$key][$i];
                }
            } else {
                $fileArray[] = $file;
            }
            $info = array();
            foreach ($fileArray as $key => $file) {
                //登记上传文件的扩展信息
                $file['extension'] = $this->getExt($file['name']);
                $file['savepath'] = $savePath;
                $file['savename'] = $this->getSaveName($file);
                // 自动检查附件
                if ($this->autoCheck) {
                    if (!$this->check($file))
                        return false;
                }
                //保存上传文件
                if (!$this->save($file))
                    return false;
                if (function_exists($this->hashType)) {
                    $fun = $this->hashType;
                    $file['hash'] = $fun($this->autoCharset($file['savepath'] . $file['savename'], 'utf-8', 'gbk'));
                }
                unset($file['tmp_name'], $file['error']);
                $info[] = $file;
            }
            // 返回上传的文件信息
            return $info;
        } else {
            $this->error = '没有选择上传文件';
            return false;
        }
    }

    /**
      +----------------------------------------------------------
     * 转换上传文件数组变量为正确的方式
      +----------------------------------------------------------
     * @access private
      +----------------------------------------------------------
     * @param array $files  上传的文件变量
      +----------------------------------------------------------
     * @return array
      +----------------------------------------------------------
     */
    private function dealFiles($files) {
        $fileArray = array();
        $n = 0;
        foreach ($files as $file) {
            if (is_array($file['name'])) {
                $keys = array_keys($file);
                $count = count($file['name']);
                for ($i = 0; $i < $count; $i++) {
                    foreach ($keys as $key)
                        $fileArray[$n][$key] = $file[$key][$i];
                    $n++;
                }
            } else {
                $fileArray[$n] = $file;
                $n++;
            }
        }
        return $fileArray;
    }

    /**
      +----------------------------------------------------------
     * 获取错误代码信息
      +----------------------------------------------------------
     * @access public
      +----------------------------------------------------------
     * @param string $errorNo  错误号码
      +----------------------------------------------------------
     * @return void
      +----------------------------------------------------------
     * @throws ThinkExecption
      +----------------------------------------------------------
     */
    protected function error($errorNo) {
        switch ($errorNo) {
            case 1:
                $this->error = '上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值';
                break;
            case 2:
                $this->error = '上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值';
                break;
            case 3:
                $this->error = '文件只有部分被上传';
                break;
            case 4:
                $this->error = '没有文件被上传';
                break;
            case 6:
                $this->error = '找不到临时文件夹';
                break;
            case 7:
                $this->error = '文件写入失败';
                break;
            default:
                $this->error = '未知上传错误！';
        }
        return;
    }

    /**
      +----------------------------------------------------------
     * 根据上传文件命名规则取得保存文件名
      +----------------------------------------------------------
     * @access private
      +----------------------------------------------------------
     * @param string $filename 数据
      +----------------------------------------------------------
     * @return string
      +----------------------------------------------------------
     */
    private function getSaveName($filename) {
        $rule = $this->saveRule;
        if (empty($rule)) {//没有定义命名规则，则保持文件名不变
            $saveName = $filename['name'];
        } else {
            if (function_exists($rule)) {
                //使用函数生成一个唯一文件标识号
                $saveName = $rule() . "." . $filename['extension'];
            } else {
                //使用给定的文件名作为标识号
                $saveName = $rule . "." . $filename['extension'];
            }
        }
        if ($this->autoSub) {
            // 使用子目录保存文件
            $filename['savename'] = $saveName;
            $saveName = $this->getSubName($filename) . '/' . $saveName;
        }
        return $saveName;
    }

    /**
      +----------------------------------------------------------
     * 获取子目录的名称
      +----------------------------------------------------------
     * @access private
      +----------------------------------------------------------
     * @param array $file  上传的文件信息
      +----------------------------------------------------------
     * @return string
      +----------------------------------------------------------
     */
    private function getSubName($file) {
        switch ($this->subType) {
            case 'date':
                $dir = date($this->dateFormat, time());
                break;
            case 'hash':
            default:
                $name = md5($file['savename']);
                $dir = '';
                for ($i = 0; $i < $this->hashLevel; $i++) {
                    $dir .= $name{$i} . '/';
                }
                break;
        }
        if (!is_dir($file['savepath'] . $dir)) {
            mk_dir($file['savepath'] . $dir);
        }
        return $dir;
    }

    /**
      +----------------------------------------------------------
     * 检查上传的文件
      +----------------------------------------------------------
     * @access private
      +----------------------------------------------------------
     * @param array $file 文件信息
      +----------------------------------------------------------
     * @return boolean
      +----------------------------------------------------------
     */
    private function check($file) {
        if ($file['error'] !== 0) {
            //文件上传失败
            //捕获错误代码
            $this->error($file['error']);
            return false;
        }
        //文件上传成功，进行自定义规则检查
        //检查文件大小
        if (!$this->checkSize($file['size'])) {
            $this->error = '上传文件大小不符！';
            return false;
        }

        //检查文件Mime类型
        if (!$this->checkType($file['type'])) {
            $this->error = '上传文件MIME类型不允许！';
            return false;
        }
        //检查文件类型
        if (!$this->checkExt($file['extension'])) {
            $this->error = '上传文件类型不允许';
            return false;
        }

        //检查是否合法上传
        if (!$this->checkUpload($file['tmp_name'])) {
            $this->error = '非法上传文件！';
            return false;
        }
        return true;
    }

    // 自动转换字符集 支持数组转换
    private function autoCharset($fContents, $from='gbk', $to='utf-8') {
        $from = strtoupper($from) == 'UTF8' ? 'utf-8' : $from;
        $to = strtoupper($to) == 'UTF8' ? 'utf-8' : $to;
        if (strtoupper($from) === strtoupper($to) || empty($fContents) || (is_scalar($fContents) && !is_string($fContents))) {
            //如果编码相同或者非字符串标量则不转换
            return $fContents;
        }
        if (function_exists('mb_convert_encoding')) {
            return mb_convert_encoding($fContents, $to, $from);
        } elseif (function_exists('iconv')) {
            return iconv($from, $to, $fContents);
        } else {
            return $fContents;
        }
    }

    /**
      +----------------------------------------------------------
     * 检查上传的文件类型是否合法
      +----------------------------------------------------------
     * @access private
      +----------------------------------------------------------
     * @param string $type 数据
      +----------------------------------------------------------
     * @return boolean
      +----------------------------------------------------------
     */
    private function checkType($type) {
        if (!empty($this->allowTypes))
            return in_array(strtolower($type), $this->allowTypes);
        return true;
    }

    /**
      +----------------------------------------------------------
     * 检查上传的文件后缀是否合法
      +----------------------------------------------------------
     * @access private
      +----------------------------------------------------------
     * @param string $ext 后缀名
      +----------------------------------------------------------
     * @return boolean
      +----------------------------------------------------------
     */
    private function checkExt($ext) {
        if (!empty($this->allowExts))
            return in_array(strtolower($ext), $this->allowExts, true);
        return true;
    }

    /**
      +----------------------------------------------------------
     * 检查文件大小是否合法
      +----------------------------------------------------------
     * @access private
      +----------------------------------------------------------
     * @param integer $size 数据
      +----------------------------------------------------------
     * @return boolean
      +----------------------------------------------------------
     */
    private function checkSize($size) {
        return!($size > $this->maxSize) || (-1 == $this->maxSize);
    }

    /**
      +----------------------------------------------------------
     * 检查文件是否非法提交
      +----------------------------------------------------------
     * @access private
      +----------------------------------------------------------
     * @param string $filename 文件名
      +----------------------------------------------------------
     * @return boolean
      +----------------------------------------------------------
     */
    private function checkUpload($filename) {
        return is_uploaded_file($filename);
    }

    /**
      +----------------------------------------------------------
     * 取得上传文件的后缀
      +----------------------------------------------------------
     * @access private
      +----------------------------------------------------------
     * @param string $filename 文件名
      +----------------------------------------------------------
     * @return boolean
      +----------------------------------------------------------
     */
    private function getExt($filename) {
        $pathinfo = pathinfo($filename);
        return $pathinfo['extension'];
    }

    /**
      +----------------------------------------------------------
     * 取得上传文件的信息
      +----------------------------------------------------------
     * @access public
      +----------------------------------------------------------
     * @return array
      +----------------------------------------------------------
     */
    public function getUploadFileInfo() {
        return $this->uploadFileInfo;
    }

    /**
      +----------------------------------------------------------
     * 取得最后一次错误信息
      +----------------------------------------------------------
     * @access public
      +----------------------------------------------------------
     * @return string
      +----------------------------------------------------------
     */
    public function getErrorMsg() {
        return $this->error;
    }

}